//** jQuery Scroll to Top Control script- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com.
//** Available/ usage terms at http://www.dynamicdrive.com (March 30th, 09')
//** v1.1 (April 7th, 09'):
//** 1) Adds ability to scroll to an absolute position (from top of page) or specific element on the page instead.
//** 2) Fixes scroll animation not working in Opera.
$(document).ready(function() {
    var templatepath = $("#templatedirectory").html();
    templatepath = '';
    var scrolltotop = {
        //startline: Integer. Number of pixels from top of doc scrollbar is scrolled before showing control
        //scrollto: Keyword (Integer, or "Scroll_to_Element_ID"). How far to scroll document up when control is clicked on (0=top).
        setting: {startline: 100, scrollto: 0, scrollduration: 1000, fadeduration: [700, 500]},
        controlHTML: '<img src="' + templatepath + 'img/default/gotop.png" style="width:40px; height:40px; margin-top: 25px; margin-right: 17px;" />', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol"
        controlattrs: {offsetx: 15, offsety: 12}, //offset of control relative to right/ bottom of window corner
        anchorkeyword: '#top', //Enter href value of HTML anchors on the page that should also act as "Scroll Up" links

        state: {isvisible: false, shouldvisible: false},
        scrollup: function() {
            if (!this.cssfixedsupport) //if control is positioned using JavaScript
                this.$control.css({opacity: 0}) //hide control immediately after clicking it
            var dest = isNaN(this.setting.scrollto) ? this.setting.scrollto : parseInt(this.setting.scrollto)
            if (typeof dest == "string" && jQuery('#' + dest).length == 1) //check element set by string exists
                dest = jQuery('#' + dest).offset().top
            else
                dest = 0
            this.$body.animate({scrollTop: dest}, this.setting.scrollduration);
        },
        keepfixed: function() {
            var $window = jQuery(window)
            var controlx = $window.scrollLeft() + $window.width() - this.$control.width() - this.controlattrs.offsetx
            var controly = $window.scrollTop() + $window.height() - this.$control.height() - this.controlattrs.offsety
            this.$control.css({left: controlx + 'px', top: controly + 'px'})
        },
        togglecontrol: function() {
            var scrolltop = jQuery(window).scrollTop()
            if (!this.cssfixedsupport)
                this.keepfixed()
            this.state.shouldvisible = (scrolltop >= this.setting.startline) ? true : false
            if (this.state.shouldvisible && !this.state.isvisible) {
                this.$control.stop().animate({opacity: 1}, this.setting.fadeduration[0])
                this.state.isvisible = true
            }
            else if (this.state.shouldvisible == false && this.state.isvisible) {
                this.$control.stop().animate({opacity: 0}, this.setting.fadeduration[1])
                this.state.isvisible = false
            }
        },
        init: function() {
            jQuery(document).ready(function($) {
                var mainobj = scrolltotop
                var iebrws = document.all
                mainobj.cssfixedsupport = !iebrws || iebrws && document.compatMode == "CSS1Compat" && window.XMLHttpRequest //not IE or IE7+ browsers in standards mode
                mainobj.$body = (window.opera) ? (document.compatMode == "CSS1Compat" ? $('html') : $('body')) : $('html,body')
                mainobj.$control = $('<div id="topcontrol">' + mainobj.controlHTML + '</div>')
                .css({position: mainobj.cssfixedsupport ? 'fixed' : 'absolute', bottom: mainobj.controlattrs.offsety, right: 0, opacity: 0, cursor: 'pointer'})
                .attr({title: 'Scroll Back to Top'})
                .click(function() {
                    mainobj.scrollup();
                    return false
                })
                .appendTo('body')
                if (document.all && !window.XMLHttpRequest && mainobj.$control.text() != '') //loose check for IE6 and below, plus whether control contains any text
                    mainobj.$control.css({width: mainobj.$control.width()}) //IE6- seems to require an explicit width on a DIV containing text
                mainobj.togglecontrol()
                $('a[href="' + mainobj.anchorkeyword + '"]').click(function() {
                    mainobj.scrollup()
                    return false
                })
                $(window).bind('scroll resize', function(e) {
                    mainobj.togglecontrol()
                })
            })
        }
    }

    scrolltotop.init();
});